[AIRFLOW-4076] Correct port type of beeline_default

[zhongjiajie]

airflow initdb will create default beeline connection
with port "10000", but airflow.models.connection
variable port is Integer type. It's better to set
values in same type as int although it could auto
transfer

Make sure you have checked all steps below.

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Tests

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Code Quality

• Passes flake8

[XD-DENG]

Thanks @zhongjiajie

I have restarted the failing tests. After CI passes, I will merge.

[codecov-io]

Codecov Report

Merging #4908 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4908      +/-   ##
==========================================
+ Coverage   75.54%   75.56%   +0.01%     
==========================================
  Files         451      451              
  Lines       29099    29099              
==========================================
+ Hits        21983    21988       +5     
+ Misses       7116     7111       -5

Impacted Files	Coverage Δ
airflow/utils/db.py	90.38% <ø> (ø)	⬆️
airflow/configuration.py	94.4% <0%> (+0.34%)	⬆️
airflow/contrib/kubernetes/kube_client.py	75% <0%> (+16.66%)	⬆️

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[zhongjiajie]

Thanks. @XD-DENG